关于汶川8.0级地震前电磁扰动异常的讨论
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摘要
通过对汶川8.0级地震前四川金河台电磁扰动数据变化的研究,结果显示:①电磁扰动0.001～1 Hz在震前每天06∶00～22:00出现非脉冲性高值波动变化,在12:00和18:00达到最大;1～10 Hz在2008年1～3月出现与超低频类似的高值变化,最大幅度为300 mV;10～20Hz无明显异常。②分析了电磁扰动高值变化与该台300 km范围内地震能量释放及地震频次的关系,电磁扰动高值时间段,地震活动频次和释放的能量均无明显的增强,因此电磁扰动的高值变化不是受到地震活动的影响。③通过对电磁扰动子夜数据(00:00～06:00)和逐日分钟值的分析,显示第一通道(0.001～1Hz)在2007年10月和2008年1～5月每天06∶00～22:00脉冲较多,而00:00～06:00无脉冲变化,有较好的规律性。综上所述,认为金河台电磁扰动在汶川8.0级地震前规律性高值变化为非震兆异常,是环境干扰的可能性较大。
Using the theory of electromagnetic disturbance,the paper analyzed the data of electromagnetic disturbance before Wenchuan MS8.0 earthquake observed at Jinhe station in Sichuan Province.The results are summarized as followed: ① The first pass(0.001～1Hz) of electromagnetic disturbance shows anomalies from April of 2007 to May of 2008.The maximum amplitude is up to 600 mV.The anomalous of electromagnetic disturbance is not impulse.The abnormal of the first pass varies at high value during daytime(06:00～22:00) and returns to normal value during nighttime(00:00～06:00) every day.The amplitude reached maximum at 12:00 and 18:00.The second pass(1～10 Hz) begins to be abnormal from January to March and returned to normal value from April of 2008.The maximum amplitude of the second pass is 300 mV.The anomalous of the third pass(10～20 Hz) is not very obviously.② The paper compared the abnormal variation with the released energy and frequency of earthquakes around Jinhe station in 300 km.The results show that the seismic activity is not increased clearly from April 2007 to May 2008.③ The paper analyzed the minute data of electromagnetic disturbance day by day.The results show that the impulse increased in March 2008,more at daytime and less in nighttime.In a word,we could conclude that the abnormal variation of electromagnetic disturbance observed at Jinhe station is not the premonition of Wenchuan MS8.0 earthquake,but it may be ambient interference.
Using the theory of electromagnetic disturbance,the paper analyzed the data of electromagnetic disturbance before Wenchuan MS8.0 earthquake observed at Jinhe station in Sichuan Province.The results are summarized as followed: ① The first pass(0.001～1Hz) of electromagnetic disturbance shows anomalies from April of 2007 to May of 2008.The maximum amplitude is up to 600 mV.The anomalous of electromagnetic disturbance is not impulse.The abnormal of the first pass varies at high value during daytime(06:00～22:00) and returns to normal value during nighttime(00:00～06:00) every day.The amplitude reached maximum at 12:00 and 18:00.The second pass(1～10 Hz) begins to be abnormal from January to March and returned to normal value from April of 2008.The maximum amplitude of the second pass is 300 mV.The anomalous of the third pass(10～20 Hz) is not very obviously.② The paper compared the abnormal variation with the released energy and frequency of earthquakes around Jinhe station in 300 km.The results show that the seismic activity is not increased clearly from April 2007 to May 2008.③ The paper analyzed the minute data of electromagnetic disturbance day by day.The results show that the impulse increased in March 2008,more at daytime and less in nighttime.In a word,we could conclude that the abnormal variation of electromagnetic disturbance observed at Jinhe station is not the premonition of Wenchuan MS8.0 earthquake,but it may be ambient interference.
引文
[1]郭自强,刘斌.岩石破裂电磁辐射的频率特性[J].地球物理学报,1995,38(2):221-225.
[2]陈化然,杨冬梅,李琪,等.1980年以来我国电磁辐射地震前兆信息的观测与研究[J].中国地震,2008,24(2):18O～187.
[3]关华平,陈智勇.地震与电磁辐射关系的定量分析[J].地震,1996,6(2):168～176.
[4]关华平,陈智勇,余索荣.首都圈及其邻近地区电磁辐射映震效果研究[J].地震,2000,20(1):65～70.
[5]阎计明,赵琨,王春和.DJY.2000B型地震电磁脉冲观测系统[J].山西地震,2006,1:38-41.
[6]王立风,王继军,陈小斌,等.2007.岩石破裂电磁辐射(EMR)现象实验研究[J].地球物理学进展,2007,(3):715～719.
[7]李美,卢军.地震电磁辐射前兆异常特征和异常指标关系研究[J].地震,2008,28(4):112-120.
[8]陈化然,刘晓灿,丁跃军,等.地震电磁扰动观测的一些新进展[J].国际地震动态,2009,(7):2-7
[9]丁跃军,陈化然,张建国.汶川8.0级地震前电磁辐射异常变化特征初步研究[J].地震地磁观测与研究,2009,30(3):11-15.
[10]张建国,刘晓灿,姚丽,等.汶川8.0级大地震前电磁扰动异常变化特征初步研究[J].地震地磁观测与研究,2010,31(5):56-60.
[11]丁跃军.汶川地震与电磁扰动现象[J].国际地震动态,2009,(7):8-18.
[12]李宏年.电磁辐射在地震短临预报中的研究[J].内江科技,2009,(11):24-25.
[12]Gotoh,K.,Akinaga,Y.,Hayakawa,M.,etal.Principal component analysis of ULF geomagneticdata for Izuislands earthquakes in July[J].J.Atmos.Electr.2000.22,1-12.
[2]陈化然,杨冬梅,李琪,等.1980年以来我国电磁辐射地震前兆信息的观测与研究[J].中国地震,2008,24(2):18O～187.
[3]关华平,陈智勇.地震与电磁辐射关系的定量分析[J].地震,1996,6(2):168～176.
[4]关华平,陈智勇,余索荣.首都圈及其邻近地区电磁辐射映震效果研究[J].地震,2000,20(1):65～70.
[5]阎计明,赵琨,王春和.DJY.2000B型地震电磁脉冲观测系统[J].山西地震,2006,1:38-41.
[6]王立风,王继军,陈小斌,等.2007.岩石破裂电磁辐射(EMR)现象实验研究[J].地球物理学进展,2007,(3):715～719.
[7]李美,卢军.地震电磁辐射前兆异常特征和异常指标关系研究[J].地震,2008,28(4):112-120.
[8]陈化然,刘晓灿,丁跃军,等.地震电磁扰动观测的一些新进展[J].国际地震动态,2009,(7):2-7
[9]丁跃军,陈化然,张建国.汶川8.0级地震前电磁辐射异常变化特征初步研究[J].地震地磁观测与研究,2009,30(3):11-15.
[10]张建国,刘晓灿,姚丽,等.汶川8.0级大地震前电磁扰动异常变化特征初步研究[J].地震地磁观测与研究,2010,31(5):56-60.
[11]丁跃军.汶川地震与电磁扰动现象[J].国际地震动态,2009,(7):8-18.
[12]李宏年.电磁辐射在地震短临预报中的研究[J].内江科技,2009,(11):24-25.
[12]Gotoh,K.,Akinaga,Y.,Hayakawa,M.,etal.Principal component analysis of ULF geomagneticdata for Izuislands earthquakes in July[J].J.Atmos.Electr.2000.22,1-12.
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